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from collections import Counter
from json import dumps
from pathlib import Path
from sys import exit

from base_hook import (
    SRC_DIR,
    ErrorMessage,
    LogLevel,
    LogMessage,
    collect_files,
    exit_hook,
    flatten_list_of_lists,
    get_base_parser,
    parallel_apply,
    report_log_messages,
)

EXTENSIONS = {".hh", ".cc"}


def check_for_switch_case_parentheses(filepath: Path) -> list[LogMessage]:
    """Check a single file for switch case parentheses."""
    lines = filepath.read_text(encoding="utf-8", errors="strict").splitlines()

    log_messages: list[LogMessage] = []

    for line_num, line in enumerate(lines, start=1):
        line = line.strip().split("//")[0]
        if "case (" in line and "):" in line:
            log_messages.append(
                ErrorMessage(
                    tool="check_for_switch_case_parentheses",
                    filepath=filepath,
                    line_number=line_num,
                    line=line,
                    message="Found Parenthesized Switch Case Label",
                )
            )

    return log_messages


if __name__ == "__main__":
    parser = get_base_parser(description="Check for Switch Case Parentheses")
    args = parser.parse_args()
    if args.files:
        n_ori = len(args.files)
        files = [f for f in args.files if f.suffix in EXTENSIONS and f.is_relative_to(SRC_DIR)]
        if args.verbose:
            print(f"Checking {len(files)} of {n_ori} specified files")
    else:
        files = list(collect_files(base_dir=SRC_DIR, extensions=EXTENSIONS, recursive=True, dirs_to_skip=[]))
        if args.verbose:
            counter_info = ", ".join([f"{num} {ext}" for ext, num in Counter([f.suffix for f in files]).items()])
            print(f"Checking {len(files)} files: {counter_info}")

    errors_list_of_lists = parallel_apply(func=check_for_switch_case_parentheses, filepaths=files)
    log_messages = flatten_list_of_lists(list_of_lists=errors_list_of_lists)
    success = report_log_messages(log_messages=log_messages, fail_threshold=LogLevel.ERROR, verbose=args.verbose)
    exit_hook(success=success)
